Adding Prompt class for #22

CustomActionTester/CAT.Common.csproj

@@ -227,6 +227,7 @@
     <Compile Include="EntityMetadataProxy.cs" />
     <Compile Include="ICATTool.cs" />
     <Compile Include="MetadataHelper.cs" />
+    <Compile Include="Prompt.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>

CustomActionTester/Prompt.cs

@@ -0,0 +1,34 @@
+using System.Windows.Forms;
+
+namespace Rappen.XTB.XmlEditorUtils
+{
+    public static class Prompt
+    {
+        public static string ShowDialog(string text, string caption, string startvalue = "")
+        {
+            Form prompt = new Form();
+            prompt.Width = 500;
+            prompt.Height = 150;
+            prompt.Text = caption;
+            prompt.StartPosition = FormStartPosition.CenterScreen;
+            prompt.FormBorderStyle = FormBorderStyle.FixedDialog;
+            Label textLabel = new Label() { Left = 50, Top = 20, Width = 430, Text = text };
+            TextBox textBox = new TextBox() { Left = 50, Top = 45, Width = 400, Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right, Text = startvalue };
+            Button cancellation = new Button() { Text = "Cancel", Left = 220, Width = 100, Top = 80, DialogResult = DialogResult.Cancel };
+            Button confirmation = new Button() { Text = "OK", Left = 350, Width = 100, Top = 80, DialogResult = DialogResult.OK };
+            //confirmation.Click += (sender, e) => { prompt.Close(); };
+            prompt.Controls.Add(textBox);
+            prompt.Controls.Add(cancellation);
+            prompt.Controls.Add(confirmation);
+            prompt.Controls.Add(textLabel);
+            prompt.CancelButton = cancellation;
+            prompt.AcceptButton = confirmation;
+            string result = null;
+            if (prompt.ShowDialog() == DialogResult.OK)
+            {
+                result = textBox.Text;
+            }
+            return result;
+        }
+    }
+}